Sometimes i wish there was a way to destroy April 1st off the face of the earth. Oh how I wish...
I would have to agree that some of the other people might have been informed of this before hand to put up such convincing acts, if any such thing did occur.

Oh I love april fools day. Its fun to play pranks on people you deal with every day. One year at my old job me and another tech spliced a Loooooooong speaker wire onto a computer speaker. We hid the speaker in the ceiling above the secretary's office the night before after she had left. Then we downloaded a bunch of cat meows onto my computer and periodically throughout the day we would play them through the speaker. Oh it was hilarious. She really thought that a cat had somehow got stuck in her ceiling.